Global ETD Search
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Showing 1 to 15 of 15 for “"rhamnolipid"”.
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A Study of Rhamnolipid Microbubble Dispersion for Bioremediation Applications
… the production of microbubble dispersions from rhamnolipid biosurfactant and the mechanism and factors that impact upon the effectiveness of the dispersion for improving bioremediation efficiency, with a specific focus on the use of microbubble dispersion as a carrier for contaminant-degrading …
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Sustainable treatment of oil contaminated waste: oil-based mud (OBM) drill cuttings and soil.
… production, purification and characterisation of rhamnolipid (RL) biosurfactant, produced from Pseudomonas aeruginosa ST5 and Pseudomonas aeruginosa PS1, and its consequent application for the removal of total petroleum hydrocarbon (TPH) in OBM drill cuttings and petroleum contaminated soil. …
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Avaliação do uso de nano carreadores de ramnolipídeos associados ao fotossensibilizador azul de Taylor na terapia fotodinâmica antimicrobiana contra Staphylococcus aureus: estudo in vitro
… blue (DMMB, λ ≈ 656 nm) and rhamnolipid nanocarriers (RL-NPs) produced by Pseudomonas aeruginosa. Seven experimental groups were established: Control (no treatment); LED (irradiation only, 20 J/cm²); DMMB (300 ng/mL); RL-NPs (300 ng/mL); RL-NPs/DMMB (300 ng/mL); PDT (DMMB + …
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Discovery and Characterization of Small Molecule Inhibitors of Biofilm Formation in Pseudomonas Aeruginosa
… research showed that production of excess rhamnolipids in P. aeruginosa PA01 caused dispersal of its biofilms. To identify small molecule inducers of rhamnolipid biosynthesis, in-house chemical libraries were screened using P. aeruginosa PS36, a strain possessing a chromosomally-encoded …
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Fate of metals in presence of minerals and mineral-organic assemblages
… coating. These were prepared with a coating of rhamnolipid, a biosurfactant primarily obtained from Pseudomonas aeruginosa. By optimizing synthesis and phase transfer conditions, particles were observed to be monodispersed and stable in water under environmentally relevant pH and ionic strength …
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Pyrimidine Enzyme Specific Activity at Four Different Phases of Growth in Minimal and Rich Media, and Concomitant Virulence Factors Evaluation in Pseudomonas aeruginosa
… virulence factors, haemolysin, iron chelation, rhamnolipid, adherence, and three types of motility (swimming, swarming, and twitching) investigated in this study, when compared to the other four wild-type strains. Growth analysis was carried out as typically done in minimal medium but also in …
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Advanced phytoremediation using soil solarization enhanced with biosurfactant as a novel approach for sustainable remediation of contaminated land in the Niger Delta, Nigeria
… and well established phytoremediation plant. Rhamnolipid biosurfactant significantly reduced the PAHs in all amended treatments of both plants in the pilot study. C. odorata was employed to investigate the effect of soil solarization enhanced with biosurfactant (500 mg/kg) on phytoremediation …
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An investigation of biosurfactant-mediated disruption and biological activity in mature biofilms formed on plastic surfaces by LPS mutants of Salmonella enterica serovar Typhimurium
… to investigate the effect of biosurfactant, rhamnolipid (produced by Pseudomonas aeruginosa), and in particular surfactin (produced by Bacillus subtilis), on S. Typhimurium wild type (LT2) and its lipopolysaccharide (LPS)-modified mutants (with mutated rfa genes, critical for LPS …
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Selective Recovery of Rare Earth Elements using Green Foam Flotation
… sulfate, SDS) and a green surfactant (mono-rhamnolipid) to understand the effectiveness of this method. The results for separation and recovery of La3+, Ce3+, Gd3+, and Yb3+ were reported as a single ion flotation (also called individual flotation), group flotation of REE, and REE flotation …
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Chimera Ligand for Pili and Lectin A Protein Controls Antibiotic-Promoted Biofilm Formation, Swarming Motility, Tolerance and Persister Formation by Pseudomonas aeruginosa
… (or one of the receptors) that will bind to rhamnolipids and our synthetic agents, and upon binding, causing the bacterial activities. </p> <p>For quantification of polysaccharides, two efficient detection and quantification methods that make use of the negative charges of the alginate …
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Enhanced vermiremediation of hydrocarbon contaminated land using biosurfactant: an integrated approach
… as stated earlier, where the application of rhamnolipid biosurfactant (0.1 mg Kg-1) posed no deleterious effect in either specie of earthworms, thus indicating that this could be a promising technique in remediating organic pollutants such as PAHs.
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Conversion of hydrocarbons to biosurfactants : an insight into the bioprocess optimisation of biosurfactant production using alkanes as inducers
… are subdivided into three main groups: rhamnolipids, sophorolipids and trehalolipids, named following their sugar moieties, respectively rhamnose, trehalose and sophorose. Biosurfactants exhibit attractive advantages over chemical surfactants. Examples of these are biodegradability, low …
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Bacterial Diversity of the Atacama Desert, Chile: The Challenges of Characterizing the Community Dynamics of Extreme Oligotrophic Ecosystems
This dissertation examines the bacterial diversity of hyperarid and arid regions of the Atacama Desert, Chile, as a first step towards understanding the global biogeochemical significance of arid-land microbial communities. The specific objectives were to characterize bacterial diversity and infer …
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Molecular imaging with mass spectrometry: instrumental and methodological advances for biological applications
Mass spectrometry imaging (MSI) is an analytical technique providing a unique combination of capabilities: label-free, non-targeted, and highly multiplex detection and imaging of chemical species ranging in mass from single protons to large proteins exceeding 100 kDa, identifiable by mass and …
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Influence of Indole and Mixed Culture Growth on Pseudomonas Aeruginosa Biofilm Structure
… of virulence mechanisms controlling pyocyanin, rhamnolipids, and elastase production, inhibiting quorum sensing.